MC68HC908GR4CDW
SOP28 The MC68HC908GR8 is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units MCUs . All MCUs in the family use the enhanced M68HC08 central processor unit CPU08 and are available with a variety of modules, memory sizes and types, and package types.
• High-performance M68HC08 architecture optimized for Ccompilers • Fully upward-compatible object code with M6805, M146805, and M68HC05 Families • 8-MHz internal bus frequency • FLASH program memory security(1) • On-chip programming firmware for use with host personal computer which does not require high voltage for entry • In-system programming • System protection features: – Optional computer operating properly (COP) reset – Low-voltage detection with optional reset and selectable trip points for 3.0 V and 5.0 V operation – Illegal opcode detection with reset – Illegal address detection with reset • Low-power design; fully static with stop and wait modes • Standard low-power modes of operation: – Wait mode – Stop mode • Master reset pin and power-on reset (POR)
• 4096 bytes of on-chip FLASH memory with in-circuit programming capabilities of FLASH program memory • 384 bytes of on-chip random-access memory (RAM) • Serial peripheral interface module (SPI) • Serial communications interface module (SCI) • One 16-bit, 2-channel timer (TIM1) and one 16-bit, 1-channel timer (TIM2) interface modules with selectable input capture, output compare, and PWM capability on each channel • 6-channel, 8-bit successive approximation analog-to-digital converter (ADC) • BREAK module (BRK) to allow single breakpoint setting during incircuit debugging • Internal pullups on IRQ and RST to reduce customer system cost • Clock generator module with on-chip 32-kHz crystal compatible PLL (phase-lock loop) • Up to 21 general-purpose input/output (I/O) pins, including: – 19 shared-function I/O pins – Up to two dedicated I/O pins, depending on package choice • Selectable pullups on inputs only on ports A, C, and D. Selection is on an individual port bit basis. During output mode, pullups are disengaged. • High current 10-mA sink/10-mA source capability on all port pins • Higher current 15-mA sink/source capability on PTC0–PTC1 • Timebase module with clock prescaler circuitry for eight user selectable periodic real-time interrupts with optional active clock source during stop mode for periodic wakeup from stop using an external 32-kHz crystal • Oscillator stop mode enable bit (OSCSTOPENB) in the CONFIG register to allow user selection of having the oscillator enabled or disabled during stop mode 4-bit keyboard wakeup port • 32-pin quad flat pack (QFP) or 28-pin plastic dual-in-line package (DIP) or 28-pin small outline integrated circuit (SOIC) • Specific features of the MC68HC908GR8 in 28-pin DIP and 28-pin SOIC are: – Port B is only 4 bits: PTB0–PTB3; 4-channel ADC module – No Port C bits
